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/*-
* Copyright (c) 1984, 1985, 1986, 1987, 1993
* The Regents of the University of California.
* Copyright (c) 2009 Robert N. M. Watson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Copyright (c) 1995, Mike Mitchell
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ipx.c
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/netipx/ipx.c 233200 2012-03-19 20:49:16Z jhb $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <sys/rwlock.h>
#include <sys/sockio.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/route.h>
#include <netipx/ipx.h>
#include <netipx/ipx_if.h>
#include <netipx/ipx_var.h>
/*
* The IPX-layer address list is protected by ipx_ifaddr_rw.
*/
struct rwlock ipx_ifaddr_rw;
struct ipx_ifaddrhead ipx_ifaddrhead;
static void ipx_ifscrub(struct ifnet *ifp, struct ipx_ifaddr *ia);
static int ipx_ifinit(struct ifnet *ifp, struct ipx_ifaddr *ia,
struct sockaddr_ipx *sipx, int scrub);
/*
* Generic internet control operations (ioctl's).
*/
int
ipx_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp,
struct thread *td)
{
struct ifreq *ifr = (struct ifreq *)data;
struct ipx_aliasreq *ifra = (struct ipx_aliasreq *)data;
struct ipx_ifaddr *ia;
struct ifaddr *ifa;
int dstIsNew, hostIsNew;
int error, priv;
/*
* Find address for this interface, if it exists.
*/
if (ifp == NULL)
return (EADDRNOTAVAIL);
IPX_IFADDR_RLOCK();
TAILQ_FOREACH(ia, &ipx_ifaddrhead, ia_link) {
if (ia->ia_ifp == ifp)
break;
}
if (ia != NULL)
ifa_ref(&ia->ia_ifa);
IPX_IFADDR_RUNLOCK();
error = 0;
switch (cmd) {
case SIOCGIFADDR:
if (ia == NULL) {
error = EADDRNOTAVAIL;
goto out;
}
*(struct sockaddr_ipx *)&ifr->ifr_addr = ia->ia_addr;
goto out;
case SIOCGIFBRDADDR:
if (ia == NULL) {
error = EADDRNOTAVAIL;
goto out;
}
if ((ifp->if_flags & IFF_BROADCAST) == 0) {
error = EINVAL;
goto out;
}
*(struct sockaddr_ipx *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
goto out;
case SIOCGIFDSTADDR:
if (ia == NULL) {
error = EADDRNOTAVAIL;
goto out;
}
if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
error = EINVAL;
goto out;
}
*(struct sockaddr_ipx *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
goto out;
}
switch (cmd) {
case SIOCAIFADDR:
case SIOCDIFADDR:
priv = (cmd == SIOCAIFADDR) ? PRIV_NET_ADDIFADDR :
PRIV_NET_DELIFADDR;
if (td && (error = priv_check(td, priv)) != 0)
goto out;
IPX_IFADDR_RLOCK();
if (ifra->ifra_addr.sipx_family == AF_IPX) {
struct ipx_ifaddr *oia;
for (oia = ia; ia; ia = TAILQ_NEXT(ia, ia_link)) {
if (ia->ia_ifp == ifp &&
ipx_neteq(ia->ia_addr.sipx_addr,
ifra->ifra_addr.sipx_addr))
break;
}
if (oia != NULL && oia != ia)
ifa_free(&oia->ia_ifa);
if (ia != NULL && oia != ia)
ifa_ref(&ia->ia_ifa);
}
IPX_IFADDR_RUNLOCK();
if (cmd == SIOCDIFADDR && ia == NULL) {
error = EADDRNOTAVAIL;
goto out;
}
/* FALLTHROUGH */
case SIOCSIFADDR:
case SIOCSIFDSTADDR:
if (td && (error = priv_check(td, PRIV_NET_SETLLADDR)) != 0)
goto out;
if (ia == NULL) {
ia = malloc(sizeof(*ia), M_IFADDR, M_NOWAIT | M_ZERO);
if (ia == NULL) {
error = ENOBUFS;
goto out;
}
ifa = (struct ifaddr *)ia;
ifa_init(ifa);
ia->ia_ifp = ifp;
ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr;
ifa->ifa_netmask = (struct sockaddr *)&ipx_netmask;
ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
if (ifp->if_flags & IFF_BROADCAST) {
ia->ia_broadaddr.sipx_family = AF_IPX;
ia->ia_broadaddr.sipx_len =
sizeof(ia->ia_addr);
ia->ia_broadaddr.sipx_addr.x_host =
ipx_broadhost;
}
ifa_ref(&ia->ia_ifa); /* ipx_ifaddrhead */
IPX_IFADDR_WLOCK();
TAILQ_INSERT_TAIL(&ipx_ifaddrhead, ia, ia_link);
IPX_IFADDR_WUNLOCK();
ifa_ref(&ia->ia_ifa); /* if_addrhead */
IF_ADDR_WLOCK(ifp);
TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
IF_ADDR_WUNLOCK(ifp);
}
break;
default:
if (td && (error = priv_check(td, PRIV_NET_HWIOCTL)) != 0)
goto out;
}
switch (cmd) {
case SIOCSIFDSTADDR:
if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
error = EINVAL;
goto out;
}
if (ia->ia_flags & IFA_ROUTE) {
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
ia->ia_flags &= ~IFA_ROUTE;
}
if (ifp->if_ioctl) {
error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR,
(void *)ia);
if (error)
goto out;
}
*(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
goto out;
case SIOCSIFADDR:
error = ipx_ifinit(ifp, ia,
(struct sockaddr_ipx *)&ifr->ifr_addr, 1);
goto out;
case SIOCDIFADDR:
ipx_ifscrub(ifp, ia);
ifa = (struct ifaddr *)ia;
IF_ADDR_WLOCK(ifp);
TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
IF_ADDR_WUNLOCK(ifp);
ifa_free(ifa); /* if_addrhead */
IPX_IFADDR_WLOCK();
TAILQ_REMOVE(&ipx_ifaddrhead, ia, ia_link);
IPX_IFADDR_WUNLOCK();
ifa_free(&ia->ia_ifa); /* ipx_ifaddrhead */
goto out;
case SIOCAIFADDR:
dstIsNew = 0;
hostIsNew = 1;
if (ia->ia_addr.sipx_family == AF_IPX) {
if (ifra->ifra_addr.sipx_len == 0) {
ifra->ifra_addr = ia->ia_addr;
hostIsNew = 0;
} else if (ipx_neteq(ifra->ifra_addr.sipx_addr,
ia->ia_addr.sipx_addr))
hostIsNew = 0;
}
if ((ifp->if_flags & IFF_POINTOPOINT) &&
(ifra->ifra_dstaddr.sipx_family == AF_IPX)) {
if (hostIsNew == 0)
ipx_ifscrub(ifp, ia);
ia->ia_dstaddr = ifra->ifra_dstaddr;
dstIsNew = 1;
}
if (ifra->ifra_addr.sipx_family == AF_IPX &&
(hostIsNew || dstIsNew))
error = ipx_ifinit(ifp, ia, &ifra->ifra_addr, 0);
goto out;
default:
if (ifp->if_ioctl == NULL) {
error = EOPNOTSUPP;
goto out;
}
error = ((*ifp->if_ioctl)(ifp, cmd, data));
}
out:
if (ia != NULL)
ifa_free(&ia->ia_ifa);
return (error);
}
/*
* Delete any previous route for an old address.
*/
static void
ipx_ifscrub(struct ifnet *ifp, struct ipx_ifaddr *ia)
{
if (ia->ia_flags & IFA_ROUTE) {
if (ifp->if_flags & IFF_POINTOPOINT) {
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
} else
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
ia->ia_flags &= ~IFA_ROUTE;
}
}
/*
* Initialize an interface's internet address and routing table entry.
*/
static int
ipx_ifinit(struct ifnet *ifp, struct ipx_ifaddr *ia,
struct sockaddr_ipx *sipx, int scrub)
{
struct sockaddr_ipx oldaddr;
int s = splimp(), error;
/*
* Set up new addresses.
*/
oldaddr = ia->ia_addr;
ia->ia_addr = *sipx;
/*
* The convention we shall adopt for naming is that a supplied
* address of zero means that "we don't care". Use the MAC address
* of the interface. If it is an interface without a MAC address,
* like a serial line, the address must be supplied.
*
* Give the interface a chance to initialize if this is its first
* address, and to validate the address if necessary.
*/
if (ifp->if_ioctl != NULL &&
(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (void *)ia))) {
ia->ia_addr = oldaddr;
splx(s);
return (error);
}
splx(s);
ia->ia_ifa.ifa_metric = ifp->if_metric;
/*
* Add route for the network.
*/
if (scrub) {
ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
ipx_ifscrub(ifp, ia);
ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
}
if (ifp->if_flags & IFF_POINTOPOINT)
rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
else {
ia->ia_broadaddr.sipx_addr.x_net = ia->ia_addr.sipx_addr.x_net;
rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
}
ia->ia_flags |= IFA_ROUTE;
return (0);
}
/*
* Return address info for specified internet network.
*/
struct ipx_ifaddr *
ipx_iaonnetof(struct ipx_addr *dst)
{
struct ipx_ifaddr *ia;
struct ipx_addr *compare;
struct ifnet *ifp;
struct ipx_ifaddr *ia_maybe = NULL;
union ipx_net net = dst->x_net;
IPX_IFADDR_LOCK_ASSERT();
TAILQ_FOREACH(ia, &ipx_ifaddrhead, ia_link) {
if ((ifp = ia->ia_ifp) != NULL) {
if (ifp->if_flags & IFF_POINTOPOINT) {
compare = &satoipx_addr(ia->ia_dstaddr);
if (ipx_hosteq(*dst, *compare))
return (ia);
if (ipx_neteqnn(net,
ia->ia_addr.sipx_addr.x_net))
ia_maybe = ia;
} else {
if (ipx_neteqnn(net,
ia->ia_addr.sipx_addr.x_net))
return (ia);
}
}
}
return (ia_maybe);
}
void
ipx_printhost(struct ipx_addr *addr)
{
u_short port;
struct ipx_addr work = *addr;
char *p; u_char *q;
char *net = "", *host = "";
char cport[10], chost[15], cnet[15];
port = ntohs(work.x_port);
if (ipx_nullnet(work) && ipx_nullhost(work)) {
if (port)
printf("*.%x", port);
else
printf("*.*");
return;
}
if (ipx_wildnet(work))
net = "any";
else if (ipx_nullnet(work))
net = "*";
else {
q = work.x_net.c_net;
snprintf(cnet, sizeof(cnet), "%x%x%x%x",
q[0], q[1], q[2], q[3]);
for (p = cnet; *p == '0' && p < cnet + 8; p++)
continue;
net = p;
}
if (ipx_wildhost(work))
host = "any";
else if (ipx_nullhost(work))
host = "*";
else {
q = work.x_host.c_host;
snprintf(chost, sizeof(chost), "%x%x%x%x%x%x",
q[0], q[1], q[2], q[3], q[4], q[5]);
for (p = chost; *p == '0' && p < chost + 12; p++)
continue;
host = p;
}
if (port) {
if (strcmp(host, "*") == 0) {
host = "";
snprintf(cport, sizeof(cport), "%x", port);
} else
snprintf(cport, sizeof(cport), ".%x", port);
} else
*cport = 0;
printf("%s.%s%s", net, host, cport);
}